Bring new excitement and convenience to your home with this keypad entry deadbolt and passage door knob by MiLocks. This keyless entry deadbolt and knob combo is a direct replacement for your traditional deadbolt and knob and installs just as easy on both left handed doors and right handed doors 1 1/4"- 1 7/8" thick. You will discover how useful it is to simply share a code instead of sharing a key. Easy access for your kids coming home from school, no more need to take your keys with you on a run, no more making extra keys for others, you will wonder why you didn't switch to keyless entry sooner. In addition to adding individual users, you can also program a master code to multiple door locks, a valuable feature for property management. The backlit keypad easily lights up with the push of a button and facilitates operation in the night time. It includes an adjustable latch with 2 different backset settings of 2 3/8" and 2 3/4" and features audible tones when locking, unlocking, and low battery warning. Operates on 4 "AA" batteries which are not included.